Hydrocarbon burner



jan, E3, w25,

F. H. SCHULENBERG HYDROCARBON BURNER FiledMarch 12, 1924 2 Sheets-Sheetl Jan, 13. 1925.

Y F. H. SCHULENBERG HYDROCARBON BURNER Filed March 12, 1924 2Sheets-Sheet 2 JWM/45,1%@

Patented dan.' 13, i925.

UNH TS iterate atar arca,

FREDERICK E. SCHULENBERG, OF LIMA, OHIO, ASSIGNORTO THE VAE() STOVE COM-PNY, 0F LIMA, OHIO, A CORPORATION 0F OHIO.

HYDROCARBON BURNER.

Application led March 12, 1924. Serial No. 698,577.

To all whom t may concern:

Be it known that I, FREDERICK H. SCHU- LENBERG, a citizen of the UnitedStates, and

a resident of Lima, in the county of Allen,

State of Ohio, have invented new and useful Hydrocarbon Burners, whichinvention is fully set forth in the following specification.

rThis invention relates to hydrocarbon burners vof the class describedin my former United States Letters Patent No. 1,411,749, dated April 4,1922, and has for its objects to improve in several respects on theburner of said patent, whereby to enhance its practicability andcommercial value.

A further and important object of the invention is the provision ofmeans in association with the burner, and a part thereof for initiallyheating the burner for generating purposes instead of using a generatingor priming liquid, such as gasoline, for such purpose, as is now thepractice.

The invention is fully described in the following specification, andwhile in its broader aspects it is capable of embodiment in numerousforms, a preferred embodiment thereof is illustrated in the accompanylngdrawings, in which,-

Figure 1 is a side elevation of a burner embodying the invention, with apart broken away. -Figure 2 is an enlarged central vertical sectionthereof with a part broken away. Figure 3 is a section on the line 33 inFie. 2, and Fig. 4 is an elevation of the electrical heating unit forthe burner with a portion of the base broken away.

Referring to the drawings, 1 designates an annular Hat base member 1,which is of a ring form and is adapted to be mounted in any suitablemanner in a stove or other support. Mounted on the base 1 is a band' 2,preferably of sheet metal, bent in annular form and forming a support atits upper edge for a'trough member 3.

The outer wall of the trough 3 is rabbeted at its upper edge, as shownat 4, to receive the lower end of a frusto-conical shell 5, the uppersmall edge of which has a ring 6 mounted thereon. A succession ofannular series of slots 7 are formed through the shell 0 5, and thematerial about each of the slots succession of annular series of slots12, thesame as the shell 5, and these slots have outwardly turned li s13 at their outer edges or directed into t e combustion chamber A.

rlhe shell 5 is enveloped in spaced concentric relation by a skirt orouter imperforate shell 14, which has its upper end formed with aninwardly projecting annular x flange 15 provided at its lower inner edgeat spaced intervals therearound with lugs 16 for resting onthe ring 6whereby the major portion ot the inner superposed edge of the Hang 15 isspaced from the ring 6, asshown at 1 The inner edge of the ange 15terminates in substantially vert-ical register with the inner edge ofthe ring 6 and the lower edge of the skirt 14 terminates adjacent to thelower edge of the trough 3 in spaced relation thereto to permit theupward passage of air therebetween into the air chamber B which isformed between the shells 5 and 14. A ring 18 is mounted on the upperend of the shell or skirt 14, being supported in spaced relation theretoby a series of lugs 19 on the ring, which lugs have lips 20 dependingfrom their outer edge in engagement with the outer side of the shell 14to center the ring thereon. The ring 18 preferably slightly overhangsthe outer edge of the shell 14, and its inner edge terminates short ofthe inner edge of the lange 1'5, thereby providing a central opening,which is'larger than the central opening formed by said flange.

The upper portion of the shell 14 is enclosed by a shell 21, the upperportion 22 of which is conically restricted to extend over the adjacentedge of the ring 18 in vertically spaced relation thereto. The conicalportion 22 of the shell has lugs 23 projectingA inward therefrom atspaced intervals therearound and resting onthe outer edge portion of thering vi8 lto support the shell in concentric spaced relation to the ringand shell 14. The shell 21 is also held in position to the shell 14 bybolts 24. The shell-21 cooperates withtthe shell 14 to form an airintensifying chamber C, which is open at its bottom for the ingress `ofair and is open at its top for the egress of air. which in itsdischargle from the chamber C is directed inwar y over the ring 15 bythe inwardly directed conical portion 22 of the shell.

An air discharge cap or head 25 is mounted above the top plate 10 of theperforated cone 9, 'such head, in the present instance, comprising thevertically spaced upper and lower 'plates 26 and 27 which have theirouter edges turned toward each 'other and spaced slightly apart byintegral lug portions 28 to form the annular air discharge space 29-from "the head between the edges of its plates. The lower plate 27 ispro# vided withfa central opening and is supported at the marginal edgeor portion of such opening by an annular outwardly andl downwardlyprojecting' flange or base member 30 that is supported ,at its loweredge in slightly spaced relation to the top plate 10 adjacent toitsouter edge by a Series of v lugs 31 on said top plate, thus providing anair discharge opening 31 between the outer edges of the late 10 andflange 30. The inner air cham er D, to which air is admitted through thebase ring 1, is in communication through the openingfll in the top plate10 with an air chamber E formed by the plate 10 and iiange 30, and thisllatter chamber is in communication j with the interior of the head 25vthrough the opening 32' in the bottom plate 27 of the head andsupporting `flange 30.

The hydrocarbon oil used as fuel forl the burner is fed to the interior.of the trough 3 through a pipe 35, which communicates with any suitablesource of fuel supply, and the fuel as it enters the trough 3 isvaporized by thel heat which is generated in the trough by the burnerwhen in action.

One feature of improvement of the present burner -over that of my saidformer patent is the provision in the outer wall of the trough 3 of anannular series of circumferentially extending slots 36 disposed avshort'distance below the upper end of the trough wall .aind openingcommunication between the interior of the trough and the air chamber B,thereby admitting air from said chamber to the interior of the trough insuiicient quantity to maintain circulation within the trough. It isfound in practice that the action of the burner-is Very materiallyimproved by the provision of the slots 36 in the trough wall, as theyprevent the possibility of a dead pocket forming in the lower portion ofthe trough.

In the operation of my improved burner, without reference .to theinitial heating means which has not as yet been described,

the'fuel vapor upward from the trough into the combustion chamber. Aportion of the air in the chamber B'also passes through the space 17 atthe upper end ofsaid chamber into the upper end portion of thecombustion chamber and the air, which is heated by passing through thechamber C,

is directed inward through the space be-v tween the ring 18 and flange15, and also inwardly over the ring 18 to feed the gases of -combustionas they rise from the combustion chamber A. A portion of the air within-the chamber D rises into the superposed chamber E and head 25 and isdischarged radially therefrom in a highly heated state through thepassages 31 and 29l'therein. It is thus evident that oxygen is fed bothoutwardly from the interior -of the burner and inwardly from theexterior thereof into the gases of combustion which y rise from thechamber A through the openings or ange '15 and ring 18. It is alsoevident that the different parts of' the burner become highly heatedduring operation, so that the air and gas in passing through thedifferent chambers are highly heated; such heat increasing toward thetop of the burner. It is foundthat the provision of the outer shell 21materially improves the action of the burner.

yFor the purpose of initially heating the burner, I provide an electricheating unit which is mounted within the air chamber D and has anelectric heating coil or element so disposed as to heat the bottom ofthe trough 3 and also to heat the shell 9 and surrounding parts from thebottom to the top thereof. This heating unit comprises the band 2 as itsbase, which band is clamped between the base ring 1 and trough 3 by avplurality of bolts 40 arrangedexternally of the band and has arms 41,preferably of stamped sheet metal construction for the purpose oflightness and cheapness, fixedly projecting inward from to the innerside of the band 2 under the trough 3 and then upward into the adjacentside portion of in the chamber D, one of such portions, in the presentinstance, being disposed below the trough S, another adjacent to thelower inner edge thereof, another substantially midway of the ends ofthe arms and another at the upper ends of said arms, therebydistributing the heat from the unit throughout the length of the chamberD and particularly to the trough 8. The apertures 43 are provided withinsulating bushings 44 of mica or other suitable insulating material.The terminals of the heating element 42 are connected to binding posts45 and 46, carried by the band 2, said posts being adapted to have leads47 connected thereto.

An electric lighting coil 48, Figure 2, is disposed around the upperportion of the shell 9, preferably in surrounding adjacent relation tothe .air discharge passage 31 for effectinga lighting of the burner whenthe current is on. The coil or element 48, in the present instance, isin shunt connection with the element 42, so that when the current isturned into said latter element a portion of such current passes throughthe shunt element 48. The element 48 is suitably supported, in thepresent instance, by fingers 49 projecting outward from the upper end ofthe shell 9.

I wish it understood that my invention is not limited to any specificconstruction, form or arrangement of the parts as it is capable of'numerous modifications and changes without departing from the spirit ofthe claims. l

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. In a hydrocarbon burner having a vertical air passage therethrough, aframe secured at its base portion to the burner and having arms risingfrom such portion into said passage, and an electric heating elementcarried by said arms and arranged to distribute heat throughout aconsiderable portion of the passage.

2. The combination with a hydrocarbon burner having a base portion anda. superposed portion, of an electric heating unit disposed within theburner, and having a frame comprising a base nember which is clampedbetween the base and superposed portions of the burner, arms fixed toand rising from said base member within the burner, and an electricheating element carried by said arms.

3. The combination with a hydrocarbon burner having a base portion and asuperposed annular fuel vaporizing trough portion, of a member clampedbetween said base and trough portions, arms extending from said memberupwardly into the burner through said trough portion, and an electricheating element carried by said arms and having portions adjacent to thetro-ugh and -other portions disposed within the burner above the trough.

4. The combination with a hydrocarbon burner having a central airchamber with a laterally directed air discharge passage at its top, anda combustion chamber surrounding the air 'chamber and in communicationat its top with said discharge, of an electric igniting element disposedin the combustion chamber around the air chamber and in adjacentrelation to said discharge passage.

5. In a hydrocarbon burner, an electric element disposed internally ofthe burner for initial heating purposes and having a portion disposedwithin the combustion space of the burner for igniting purposes.

6. The combination with a hydrocarbon burner having an interior airchamber and a combustion space exterior to said chamber, of an electricheating element disposed within the air chamber and having a portiondisposed within the combustion space for igniting purposes.

7. In a hydrocarbon burner, an annular fuel vaporizing trough,perforated shells rising from the inner and outer walls of the trough,the inner shell forming an air chamber andthe two shells Vcooperating toform a combustion chamber, a shell surrounding the outer of saidperforated shells to form an air chamber open to the atmosphere at itstop and bottom, an air discharge head mounted on the inner perforatedshell and having provision for the discharge of air into the combustiblegases rising from said shells and electrical heatin means disposedwithin the inner shell and iaving a portion disposed without said headto ignite the gases rising from the shells.

" In vtestimony whereof I have hereunto signed my name to thisspecification.

FREDERICK H. SCHULENBERG.

lOl)

